1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * the UCLA Ficus project. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)umap.h 8.3 (Berkeley) 01/21/94 11 * 12 * @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 13 */ 14 15 #define MAPFILEENTRIES 64 16 #define GMAPFILEENTRIES 16 17 #define NOBODY 32767 18 #define NULLGROUP 65534 19 20 struct umap_args { 21 char *target; /* Target of loopback */ 22 int nentries; /* # of entries in user map array */ 23 int gnentries; /* # of entries in group map array */ 24 u_long (*mapdata)[2]; /* pointer to array of user mappings */ 25 u_long (*gmapdata)[2]; /* pointer to array of group mappings */ 26 }; 27 28 struct umap_mount { 29 struct mount *umapm_vfs; 30 struct vnode *umapm_rootvp; /* Reference to root umap_node */ 31 int info_nentries; /* number of uid mappings */ 32 int info_gnentries; /* number of gid mappings */ 33 u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for 34 user mapping in ficus */ 35 u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for 36 group mapping in ficus */ 37 }; 38 39 #ifdef KERNEL 40 /* 41 * A cache of vnode references 42 */ 43 struct umap_node { 44 struct umap_node *umap_forw; /* Hash chain */ 45 struct umap_node *umap_back; 46 struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */ 47 struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */ 48 }; 49 50 extern int umap_node_create __P((struct mount *mp, struct vnode *target, struct vnode **vpp)); 51 extern u_long umap_reverse_findid __P((u_long id, u_long map[][2], int nentries)); 52 extern void umap_mapids __P((struct mount *v_mount, struct ucred *credp)); 53 54 #define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) 55 #define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) 56 #define UMAPTOV(xp) ((xp)->umap_vnode) 57 #ifdef UMAPFS_DIAGNOSTIC 58 extern struct vnode *umap_checkvp __P((struct vnode *vp, char *fil, int lno)); 59 #define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__) 60 #else 61 #define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) 62 #endif 63 64 extern int (**umap_vnodeop_p)(); 65 extern struct vfsops umap_vfsops; 66 #endif /* KERNEL */ 67